Process of refining metals.



UNITED sra rns g rnnr OFFICE ALBERT PATTON, OF MCKEESPORT, PENNSYLVANIA.

PROCESS OF REFINING METALS.

No Drawing. Application filed September To all lf/llI/H it may concern Be it known that I. Anunn'r lxr'rox. citizen of the United States of .unerica. re siding at McKeesport, in the county of .\llegheny and State of Pennsvlvania. have invented certain new and useful improvements in Processes of Refining Metals. of which the following is a specification.

My invention relates to the manufacture of steel and relates more particularly to a process of rctiniug metals b mean. of which ph sphorus. oxids. silicates. and ther impurities are removed during the retiuing o eration. in eliminating these elcntent or impurities in the manner herein set t'orth. I am able to produce a non-corrosive teel. containing as low as one't'enth of 11 titanganese; I also produce a more ductile and easily welded metal; also a metal having the qualifications conducive to the manufacture of rails and products requiring high tensile strength.

To put my process into practice. 1 use the iron that has been blown in an ordinary lies semer converter or the iron from an acid open hearth furnace, the carbon baring been reduced to a low-percentage. (in the neigle borhood of 4/100 of 1%) and the silicon and manganese reduced as low as possible.

The process consists of a number of steps which may vary to meet various conditions. but which, in general, are of similar charac ter, these general steps being as follows: Pour into an acid lined intermediate receptacle, then pour from this receptacle into a basic-lined receptacle, care being taken not to allow the acid slag to enter the basic-lined receptacle,and adding to the basic-lined receptacle, before, and possibly when pouring, materials for making a basic slag. Manganese is added when the desired character of the product requires. The effect of this relative arrangement of steps on the iron is substantially as follows: The pour ing of the metal into the acid-lined intermediate receptacle has substantially the same effect as the well-known methods of re fining, my process differing from these.

methods mainly in the subsequent treat ment. When pouring from the acid-lined intermediate receptacle, especial care is basic slag, such as lime-stone (CaCO Specification of Letters Patent.

24,1907. Serial No. 391.3323.

tluors1 iar (Call), etc.. are charged into the 5 basiedined receptacle before (and possibly to. (\xith the tttllt it reduced to a low percentrtge and tilt llltnlt and l ttttttgdtltfl rcdu-"ed as low 2t po sible). the phosphorus in the bath i there as pluisphoric acid (P th). due to the phosphorus having more allinil tor the oxygen than the car hon, ili on or manganese (as these have been i) reduced) or the iron itself. When th metal is brought into contact with lltt. t

basic materials. a basic slag is made at which time. oxids ,and other impurities are removcd and the phosphorus. in the form of phosphoric acid (P 0 l. absorbed by this slag. The heat is then ready to be poured directly into molds or int another recep tacle tor the convenience of handling the heat to the place of casting. 'lbe manganese or re-citrlmrizer desired can be added in the basicdined receptacle or in the receptacle to which the metal is poured from the basiclined receptacle.

In this process. by introducing a portion of the material for making basic slag into the metal being poured into the basic receptacle. the slag is formed quickl)- and all of the lime is used. practically eliminating the presence of small particles of the unused materials in the slap.

The use of the onids in the bath actsto reduce the phosphorus and make the slag,

ing the acid slag in the acid-lined receptacle, and adding basic materials in the basiclined receptacle 2. The method of manufacturing steel 5 which consists in subjecting the product of a Bessemer converter or an acid open hearth furnace-to a refining operation which ineludes the following steps: pouring the molten metal into an acid-lined intermediate receptacle, then pouring from said receptacle purities in the bath to make the slag.

3. The method of manufacturing steel l which consists in subjecting the product of i a Bessemer converter or an acid open hearth furnace to u refining operation which ineludes the following ste s: pouring the mol- 1 ten metal into an aci -lined intermediate receptacle, then pouring from said receptacle into a basic-lined receptacle and retaining the acid slag in the acid-lined receptacle, adding basic-materials in the basic-lined receptacle, and adding manganese to the:

molten metal.

. 4. The method of manufacturing steel hich consists in subjecting the product of a Bessemer converter or an acid open hearth ten metal into anaeid lined intermediate cle into a basic-lined receptacle and. relaining the acid. slag in the acidlined receptacle, adding basic materials in the basic lined receptacle, and adding" manganese to the bath in the basic-lined receptacle.

5 method of mar .ifac; tzring steel which consists in subjecting the product of a Bessemer converter or acid open hearth furnace to a refining operation Which ineludes the following steps: pouring the molten metal into an acid lined intermediate rmeptaele, then pouring from said recepiacle into a l asic-lined receptacle and retaining the acid slag in the acid-lined receptacle, addinghasic materials in the basic lined receptacle and adding the recarburizer in the basic-lined receptacle Intestimony whereof I ailix my signature in the presence of two Witnesses.

ALBERT IATTON.

\Vitnesses:

H. C. EVERT, i A. J. TRIGG.

receptacle, then pouring from said recepta-. 

